Hurricane Katrina has left New Orleans awash with looters and predators of every stripe. The power grid of the city has been destroyed, and New Orleans has been reduced to the level of a medieval society. There is no law, no order, no sanctuary. Bodies float in the streets and lie impaled on the branches of flooded trees. In the midst of an apocalyptical nightmare, Detective Dave Robicheaux must find two serial rapists, a morphine-addicted priest, and a vigilante who may be more dangerous than the criminals looting the city.